In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at Diffuser inlet radius Impeller inlet radius Diffuser outlet radius Impeller outlet radius TRUE ANSWER : ? YOUR ANSWER : ?
The maximum delivery pressure in a rotary air compressor is 10 bar 30 bar 50 bar 20 bar TRUE ANSWER : ? YOUR ANSWER : ?
The material commonly used for air craft gas turbine is Duralumin High alloy steel Timken, Haste alloys Stainless steel TRUE ANSWER : ? YOUR ANSWER : ?
Gas turbine works on Brayton or Atkinson cycle Rankine cycle Ericsson cycle Carnot cycle TRUE ANSWER : ? YOUR ANSWER : ?
In gas turbines, high thermal efficiency is obtained in Closed cycle Closed cycle & Open cycle Open cycle Closed/open depending on other considerations TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statement is correct relating to rocket engines? All of these The combustion chamber in a rocket engine is directly analogous to the reservoir of a supersonic wind tunnel The stagnation conditions exist at the combustion chamber The exit velocities of exhaust gases are much higher than those in jet engine TRUE ANSWER : ? YOUR ANSWER : ?
The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is Heated Exhaust gases drive the compressor Bled gas from turbine is heated and readmitted for complete expansion Compressed air before entering the combustion chamber is heated TRUE ANSWER : ? YOUR ANSWER : ?
A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine. Same None of these Higher Lower TRUE ANSWER : ? YOUR ANSWER : ?
The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation 5% 0.1% 0.5% 1.0% TRUE ANSWER : ? YOUR ANSWER : ?
The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the Rotor to static enthalpy rise in the stage Rotor to static enthalpy rise in the stator Stator to static enthalpy rise in the stage Stator to static enthalpy rise in the rotor TRUE ANSWER : ? YOUR ANSWER : ?